Am If And Rf Alignment - Rotel Rt-226 Technisches Handbuch
Inhaltsverzeichnis
AM
SIGNAL
GENERATOR
AM IF and RF Alignment Procedure (Part II LW Section)
Part II: LW Section (LW/MW/FM only)
Instruments:
AM Signal Generator and AC VTVM.
Notes: Set Function SelectorSwitch to LWposition. Input signalmust be kept aslow aspossibleto avoidAVC action.
Generator
Step
Coupling
Pin No. 4 (on IF
1
PCB thru. a 0.01
mfd. capacitor
Test Loop
2
Radiates Signal
into ferrite loop
stick
antenna
3
4
Repeat step 2 and 3 until no further improvement
*NOTES:After adjustment, c heckto makesurethat, indeed,both LWandMWalignment a rein the beststate.
Otherwise repeat LW and MW alignment procedure until no further improvement is noticed. (LW/MW/FM
only)
ICIOI
L202
PIN
4
L 203
L 204
Fig. 2. AM IF and RF Alignment
Abb. 2. MW-ZF und HF-Abgleich (LW)
Fig. 2. Alignement AM IF et HF (LW)
Frequency
455KHz
(400Hz
Non intefering
30% Mod.)
at Low
Dial
160KHz
(400Hz
160KHz
30% Mod.)
scale
330KHz
(400Hz
330KHz
Mod.)
scale
LOOI
CTS
CT4
Tuning Dial
Setting
L202, L203 and
end of
L204 (on IF PCB)
scale
on dial
L701 (OSC)
LOOI (ANT)
(REAR
on dial
CT7 (OSC)
CT6 (ANT)
is-noticed.
REAR PANEL
VIEW (LW
L702
L701
MW
LW
osc
osc
CT7
LW OSC ANT
Hook-Up (LW)
Adjust
Adjust for
Maximum reading
on AC VTVM
SIDE)
INSIDE
PORTION)
o
o
CTS
Inhaltsverzeichnis
